/*
 * $Id: TextCrossingPainter.java 3100 2008-10-14 22:33:10Z rah003 $
 *
 * Copyright 2008 Sun Microsystems, Inc., 4150 Network Circle,
 * Santa Clara, California 95054, U.S.A. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
 */
package org.jdesktop.swingx.plaf.basic;

import java.awt.Color;
import java.awt.Graphics2D;
import java.awt.Insets;
import java.awt.Rectangle;

import javax.swing.JComponent;
import javax.swing.JLabel;
import javax.swing.SwingUtilities;

import org.jdesktop.swingx.painter.AbstractPainter;

/**
 * Painter used to cross-out unselectable dates.
 * 
 * PENDING JW: subclass (or maybe even use?) one of the painter subclasses.
 * 
 * @author Jeanette Winzenburg
 */
class TextCrossingPainter<T extends JComponent> extends AbstractPainter<T> {
	Rectangle paintIconR = new Rectangle();
	Rectangle paintViewR = new Rectangle();
	Rectangle paintTextR = new Rectangle();
	Insets insetss = new Insets(0, 0, 0, 0);
	Color crossColor;

	/**
	 * {@inheritDoc}
	 * <p>
	 * 
	 * Paints a diagonal cross over the text if the comp is of type JLabel, does
	 * nothing otherwise.
	 */
	@Override
	protected void doPaint(Graphics2D g, JComponent comp, int width, int height) {
		if (!(comp instanceof JLabel))
			return;
		JLabel label = (JLabel) comp;
		Insets insets = label.getInsets(insetss);
		paintViewR.x = insets.left;
		paintViewR.y = insets.top;
		paintViewR.width = width - (insets.left + insets.right);
		paintViewR.height = height - (insets.top + insets.bottom);
		paintIconR.x = paintIconR.y = paintIconR.width = paintIconR.height = 0;
		paintTextR.x = paintTextR.y = paintTextR.width = paintTextR.height = 0;
		SwingUtilities.layoutCompoundLabel(label, label.getFontMetrics(label.getFont()), label.getText(), null,
				label.getVerticalAlignment(), label.getHorizontalAlignment(), label.getVerticalTextPosition(),
				label.getHorizontalTextPosition(), paintViewR, paintIconR, paintTextR, label.getIconTextGap());
		doPaint(g, paintTextR);
	}

	private void doPaint(Graphics2D g, Rectangle r) {
		Color old = g.getColor();
		g.setColor(getForeground());
		g.drawLine(r.x, r.y, r.x + r.width, r.y + r.height);
		g.drawLine(r.x + 1, r.y, r.x + r.width + 1, r.y + r.height);
		g.drawLine(r.x + r.width, r.y, r.x, r.y + r.height);
		g.drawLine(r.x + r.width - 1, r.y, r.x - 1, r.y + r.height);
		g.setColor(old);

	}

	/**
	 * 
	 * @param crossColor
	 *            the color to paint the cross with
	 */
	public void setForeground(Color crossColor) {
		Color old = getForeground();
		this.crossColor = crossColor;
		firePropertyChange("foreground", old, getForeground());
	}

	/**
	 * Returns the color to use for painting the cross.
	 * 
	 * @return the color used for painting.
	 */
	public Color getForeground() {
		return crossColor;
	}
}